| En Name: | Oktyabrsky District |
| Ru Name: | Октябрьский район |
| Loc Name1: | Октябрин район |
| Loc Lang1: | Kalmyk |
| Coordinates: | 47.85°N 71°W |
| Federal Subject: | Republic of Kalmykia |
| Adm Data As Of: | June 2011 |
| Adm Ctr Type: | settlement |
| Adm Ctr Name: | Bolshoy Tsaryn |
| Selsoviet Type1: | Rural administrations |
| No Of Selsoviets Type1: | 7 |
| No Of Rural Localities: | 12 |
| Mun Data As Of: | March 2015 |
| Mun Formation1: | Oktyabrsky Municipal District |
| Mun Formation1 No Of Urban Settlements: | 0 |
| Mun Formation1 No Of Rural Settlements: | 7 |
| Area As Of: | June 2011 |
| Area Km2: | 3680.58 |
| Pop 2010Census: | 9438 |
| Urban Pop 2010Census: | 0% |
| Rural Pop 2010Census: | 100% |
| Established Date: | 1977 |
| Website: | http://oktrmo.ru |
| Date: | June 2015 |
| Population of Oktyabrsky District | |
| Label1: | 2010 Census |
| Data1: | 9,438 |
| Label2: | 2002 Census |
| Data2: | 9,213 |
| Label3: | 1989 Census |
| Data3: | 12,633 |
| Label4: | 1979 Census |
| Data4: | 12,124 |
Oktyabrsky District (Russian: Октя́брьский райо́н; Kalmyk; Oirat: Октябрин район, Oktyabrin rayon) is an administrative[1] and municipal[2] district (raion), one of the thirteen in the Republic of Kalmykia, Russia. It is located in the north of the republic. The area of the district is 3680.58km2. Its administrative center is the rural locality (a settlement) of Bolshoy Tsaryn. As of the 2010 Census, the total population of the district was 9,438, with the population of Bolshoy Tsaryn accounting for 58.2% of that number.
The district was established in 1977.
Within the framework of administrative divisions, Oktyabrsky District is one of the thirteen in the Republic of Kalmykia. The district is divided into seven rural administrations which comprise twelve rural localities. As a municipal division, the district is incorporated as Oktyabrsky Municipal District. Its seven rural administrations are incorporated as seven rural settlements within the municipal district. The settlement of Bolshoy Tsaryn serves as the administrative center of both the administrative and municipal district.